Hey ppl! anyone who can help me with this i will be so grateful! ive been stuck on it for 2 days(dumbarse:grumpy: ) thx!(adsbygoogle = window.adsbygoogle || []).push({});

1) A proton orbits a long chared wire, making 1.0x10^6 revolutions per second. The radius of the orbit is 1.0cm. What is the wire's linear charge density?

2) Show that the on axis electic field of a ring of charge has the expected behaviour when z<<R and when z>>R.

The answer to the first questions is -2.29nC/m, but im clueless about how to go about it, i've also tried applying circular kinematics but have not been successful. The second question i am absolutly dumbfounded by. Thx again anyone who helps!

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# Homework Help: Electric field proton wire problem

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